[ruby-core:45582] [ruby-trunk - Bug #6578] (Ruby 1.9.2-p290) Built-in JSON library fails if "Parser" is defined at top level

Issue #6578 has been updated by alexdowad (Alex Dowad).


By the way, I haven't checked whether this works on Ruby 1.9.3... I am (sadly) stuck developing on Windows and can't install multiple versions of Ruby without RVM.
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Bug #6578: (Ruby 1.9.2-p290) Built-in JSON library fails if "Parser" is defined at top level
https://bugs.ruby-lang.org/issues/6578#change-27178

Author: alexdowad (Alex Dowad)
Status: Open
Priority: Normal
Assignee: 
Category: 
Target version: 1.9.2
ruby -v: ruby 1.9.2p290 (2011-07-09) [i386-mingw32]


To duplicate:

    class Parser
    end
    require 'json'

The culprit is line 27 of common/json.rb:

    remove_const :Parser if const_defined? :Parser

#const_defined? returns true even if Parser is defined at the top level, not within JSON. In this case, #remove_const fails with an exception. A possible fix would be:

    remove_const :Parser if constants.include? :Parser


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